PROBLEM ANALYSIS AND CONTROL OPTIMIZATION OF MAIN AUTOMATIC PROTECTION FACILITIES IN THE FGD SYSTEM

LUO Jie1; WANG Bochun1; JIANG Jiefu21.Hunan Provincial Electric Power Testing & Research Institute

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PROBLEM ANALYSIS AND CONTROL OPTIMIZATION OF MAIN AUTOMATIC PROTECTION FACILITIES IN THE FGD SYSTEM

Thermal Power Generation Vol. 39, Issue 9, Pages: 71-73(2010)

更新时间：2025-09-28

- PROBLEM ANALYSIS AND CONTROL OPTIMIZATION OF MAIN AUTOMATIC PROTECTION FACILITIES IN THE FGD SYSTEM
- 作者机构：
  
  1. 湖南省电力公司试验研究院
  2. 株洲华银火力发电有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： X701.3
- Published：2010
- 稿件说明：
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LUO Jie1, WANG Bochun1, JIANG Jiefu21.Hunan Provincial Electric Power Testing & Research Institute. PROBLEM ANALYSIS AND CONTROL OPTIMIZATION OF MAIN AUTOMATIC PROTECTION FACILITIES IN THE FGD SYSTEM[J]. Thermal Power Generation, 2010, 39(9): 71-73.
DOI：

LUO Jie1, WANG Bochun1, JIANG Jiefu21.Hunan Provincial Electric Power Testing & Research Institute. PROBLEM ANALYSIS AND CONTROL OPTIMIZATION OF MAIN AUTOMATIC PROTECTION FACILITIES IN THE FGD SYSTEM[J]. Thermal Power Generation, 2010, 39(9): 71-73. DOI：

摘要

分析了近几年来在各火电厂石灰石-石膏湿法烟气脱硫系统中因增压风机入口导叶自动控制系统调整不当引起的机组引风机失速和机组负荷振荡

以及原烟气/净烟气挡板故障关闭时严重影响炉膛负压并冲击尾部烟道设备的问题。为此

对原烟气脱硫(FGD)控制系统进行了将增压风机入口烟气压力作为被调量

引风机挡板开度信号处理后作为前馈

通过比例积分调节器组成恒值复合控制系统调节增压风机入口烟气压力

以及净烟气挡板开信号消失3s触发FGD主保护动作的优化。优化后经在某电厂2×310MW机组应用

较好地解决了原FGD控制系统存在的问题。

Abstract

The problems that made ID fans to stall and the load of unit to fluctuate due to unsuitable auto-control of the booster fans' inlet guide vane in system of limestone/gypsum wet flue gas desulphurization (FGD) in recent years have been analysed

as well as the fluctuation of furnace draft and damage of equipments positioned in flue duct of the tail section due to fault close of raw/clean gas dampers being considered.For this

the optimization of control system for original FGD system has been carried out

i.e.the inlet flue gas pressure of booster fan is used as controlled variable

and the open degree of ID fan's damper after processing is used as front feed

and through proportional integral regulator to constitute a constant value composite control system to regulate inlet flue gas pressure of the booster fan

and triggering the main protection system of FGD within 3 s after eliminating the open signal of clean gas damper.After optimization

through application on 2×310 MW units in one power plant

the problems existing in control system of original FGD facility have been comparatively well resolved.

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